MASK N1 N2 N3 MASK SET -- Mask spectra
Parameters:
N1 -- Slot number of first spectrum to mask
N2 -- Slot number of last spectrum to mask.
N3 -- Slot number of first output spectrum
MASK-- Yes to mask, No to unmask.
SET -- Yes to set mask.
MASK applies a mask by making masked pixels have negative error
bars. They will then be ignored by fitting routines and for plotting.
Selection criteria are applied.
Related routine: EMUL
This command belongs to the classes: fudging .